August siekmann



(No Model.)

A. SIEKMANN.

COMBINATION LOCK No. 427,922. Patented May 13,1890.

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UNTTED STATEs FATENT GEETCE.

AUGUST SIEKMANN, OF RICE LAKE, YVISGONSI.

CowllNTlONjLOCK.

SPECIFICATION forming part of Letters Patent No. 427,922, dated May 13, 1890.. Application filed August 27, 1888. Serial No, 283,890. (No model.)

- T0 @ZZ whom it may concern:

whereby a lock is produced combining all the' advantages ofthe ordinary look and latch with those of a combination or keyless lock, as herein after shown and described, and specifically pointed out in the claims.

In the drawings, Figure l is a side elevation with the cover removed and the latchbolt open or extended. Fig. 2 is a similar view with the latch-bolt closed or withdrawn. Fig. 3 is a cross-sectional view on the line X X of Fig. l. Fig. 4 is a cross-sectional view on the line Y Y of Fig. l. Fig. 5 is a view, partially in section, of the mechanism on the outside of the door.

A is the casing of the lock, connected to the door B by screws orvi'n any other suitable manner. ,In the upper part of the casing -A a latch-bolt D is adapted to slide, with its inner end turned at right angles at D2 and held outward by Ya spring E, as shown.

F represents another bolt lyingalong the bottom of the casing A, and with oneend turned upward Vat F2 and lpartially overlapping the end D2 of the bolt D",. while the other end F3 is formed fork -shaped and adapted to receive the lower end G of a jointed lever G2, as shown. This lever G2 is pivoted at ce to the casing A and jointed at a2, and provided with an arm G2, adapted to enter the notches h of a series of tumblers ll', constructed and adapted to be operated M represents the shank ot a knob pivoted on the inner face of the casing, so that the knob may be actuated from the interior of the room, and with a curved arm M2 on the shank inside the casing and adapted to rest against the inside of the projecting end D2 of the latch-bolt D. rlhe bolt F F2 is narrower than the bolt D D2, and its end F2 and the arm M2 are adapted to act only on the end D2 above the end F2 ot the bolt F, so that the bolt D may be thrown back by turning the knob from the inside of the room without affecting the combination features ot the mechanism. By this means the door may be opened from the inside ot the room without operating the combination mechanism.

M3 is another shank or bolt journaled through the lower part of the Casin g and projecting outward through the door B, and which will be provided with a knob (not shown) by which it may be turned. This shank has a curved arm M4, similar to the curved arm M2 on the shank M', and which is adapted to act only upon the part F2 of the bolt F, the difference in width of the two parts D2 F2v enabling the two arms M2 MLl to operate independently, as indicated inFig, 2.

Vhen it is desired toopen the Vdoor from the inside, it is only necessary to turn the knob (not shown) on the shank M,'when the varm M2 will move the latoh-boltD backward, leaving the combination mechanism. unaffected.

If an attempt is made to open the door from the outside without setting the combination, the arm G3 on the lever G2, resting against the edges of the tumbler-disks lvl', prevents the lever G2 from being moved inward toward the center of the tumblers, while the end G of the lever, resting in the forked end F3 of the bolt F holds the latter intact and prevents the shank M3 from turning; but, as betore stated, when the tumblers are set so as to bring the notches h all in line, as in Fig. 2, the arm G3 is free to enter them and permit the bolt F to be thrown back when the shank M3 is turned, as in Fig. 2, this movement of the bolt F also operating the bolt D by reason of the part F2 overlapping the part D2 and pushing the two bolts backward together, as shown in Fig. 2.

IOO

The arrangement of the tumblers Il does not differ materially from the ordinary method of construction, and as I have shown, described, and claimed the method of operatin g the tumblers in another application tiled August 27, i858, Serial No. 283,891, I do not wish to further describe it here, except so far as may be necessary to illustrate certain novel features therein contained.

In the present construction, as in my application above referred to, the outer end of the shaft Il3 of the tumblers is provided with a graduated disk N revolving beneatha hood N2, partially covering its upper side, and with notches e in its rim, in which springs r/ beueath the hood N2 cclicky when the disk is turned, to enable the combination to be operated in the dark.

In the construction shown the disk N rests upon a plate N3, which in turn is secured to the face of the door and forms the escutcheen. on which the disk turns. This hood N2 is made reversible on the plate Ni", being adapted to be placed on either end by screws z, extra holes being formed in the plate N .for that purpose, so that when the lock is reversed to adapt it to a right or left hand door the hood removed and the knob-shank M' placed. in a hole M (shown only in dotted lines in Fig. 5) and the hood replaced on the lower edge of the plate N. rI 'hus the lock maybe easily changed from right to le ft hand without affecting any of its parts or changing their mode of operation.

The lever G2 is formed with an arm G", between which and the main part G2 of the lever a shaft I is mounted and projeetingout through the door I3 and lock-casing A into the interior of the room. This shaft is provided \vith a cam I, adapted to act upon the arm G'L when the shaft l is turned to throw the lever GEl out of action by raising it upward, as indicated by dotted lines in Fig. l, and removing the end G from its socket F3 in the bolt F', so that, if so desired, the lock maybe left free to be operated from the outside Without setting the combination.

It Will be often found desirable to arrange the door so as to be opened from either side without using the combination mechanism,

and this simple device enables me to do this very readily.

liavin g thus described my invention, what crate said bolt D from the inside of said.

door, and knob-shaft M, having cam M4 and adapted to operate said bolts F D from the outside of said door, substantially as set forth.

i. In a combined combination lockand latch, a casing A, attached to a door and having bolt D, tumblers II', having notches l) and adapted to be operated from outside thedoor to bring said notches in opposite relations, secondary bolt F', having forked end F and adapted to operate said bolt D when moved laterally, jointed lever G2, pivoted Within said Casin g and with arm G3,an d engagingwith said tumblers and with said forked bolt, and shaft I, having cam P2, adapted to engage with said jointed lever to throw it out of position when the tumblers are not to be employed, substantially as set forth.

In a combined combination lock and latch, a casing A, having bolts D and F and tumblers II Within it, the latter mounted upon stud H3, passing out through the dooi` to which said casing is attached, escuteheonplate N3, having reversible hood N2, and gradud ated disk N', having notched rim adapted to engage u'ith springs g Within said hood. substantially as Aset forth.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

AUGUST SIEKMANN.

"Witnesses:

WILLIAM. EYNER,

WILLIAM P. SWIFT. 

